What spec have you found to be the most alt-o-holic proof in Legion?

As a long suffering altoholic, I frequently jump between different classes and specs. I have really only played WoW casually, so just because I'm bad at a spec hasn't really made much of a difference. I am going to start improving and doing more endgame content, so I want to focus on primarily playing only one spec right now. Right now I'm making a pros and cons list of specs that I have experience on, but it can be tough to choose, since I find so many specs enjoyable, even between healers, DPS, and tanks.

I know everyone's opinion will vary, but I thought it might be a fun discussion to have. What spec have you played in Legion that you feel you could most play alone, without wandering away to alts or needing to change specs frequently in order to accomplish things?

Would love to hear your opinions!